IO::Pager is lightweight and can be used to locate an available pager
and set $ENV{PAGER} sanely or as a factory for creating objects defined
elsewhere such as IO::Pager::Buffered and IO::Pager::Unbuffered.

IO::Pager subclasses are designed to programmatically decide whether
or not to pipe a filehandle's output to a program specified in $ENV{PAGER}.
Subclasses are only required to support filehandle output methods and close,
namely

Author:	Jerrad Pierce
WWW: http://search.cpan.org/dist/IO-Pager/